I have this one LCD TV | LG 47LK520, Full HD 1080P, 120Hz, Smart Energy Saving | LG Electronics Canada and used it a few times on my pc. I'm no expert, but I like to think my eyes can see jitter and screen flaws, and this one came out the best when I was shopping for tv's last xmas. bestbuy doesn't even list it for sale anymore so there could be better ones out, I paid $700 i think.
If you're concerned about picture adjustment, this one lets you do ISF calibration, but has a good wizard to get you close enough on your own. This forum will keep you busy for days, like it did for me Home Theater Gaming

I agree that it is nice to see your games on a screen this size, and I'd use it more if my house was accommodating, but 30' HDMI and speaker wires aren't pretty when left lying around.

edit: when sitting back on the couch, I found I was still almost too far from the screen to see all the small details, nor did I feel there was latency or lag that disturbed my experience, in fact I would argue it's very perceptible to most people at all.

I would say the best in terms of actual image reproduction would likely be the Panasonic 50-series. The 50" GT50 has a Game Mode which reduces input latency to around 25ms but remember that plasmas still suffer from image retention after prolonged static images (ie: inventory bar, menu, etc.).

Some of the other mid-range and upper echelon LED TVs have a Game Mode as well but I have found them to degrade image quality more than Panasonic's mode. They don't however suffer image retention but black levels, uniformity and in some cases color reproduction is miles behind plasma.

There are positives and negatives to both situations. I do however have to caution people about randomly saying "buy a PC monitor" as many people want an all-in-one device for their living rooms and a PC monitor just isn't big enough for that.